code: def testAllPositive(self):
      input = [1] * 100
      self.assertAlmostEqual(ZeroCrossingRate()(input), 0)
  
file_path: essentia/test/src/unittests/temporal/test_zerocrossingrate.py
imports: from essentia_test import *
label_desc: Use image node_id 4 for calling the TestZeroCrossingRate obj's underlying member method code with example usage: obj.testAllPositive() without return types